Door construction for heat-insulated chambers.



UNITED sTATns i 'PATENT onnron A JESSE JACKSON, OF KOKOMO, INDIANA, ASSIGNOR TO THE GLOBE STOVE.& RANGE COMPANY, 0E KOKOMO, INDIANA.

DOOR CONSTRUCTION FOR HEATQINSULATED CHAMBERS.

Specification of Letters Patent.

Application filed May 3, 1915. Serial No. 25,585.

To all whom it may concern:

Be it known that I, Jnssn JACKSON, citizen of the United States, residing at Kokomo, county of Howard, State of Indiana, have invented certain new and useful Tmprovements in Door Constructions for Heat-Insuflated Chambers, of which the following is a specification.

It is the object of my present invention to provide a door construction' for heat-insulated chambers, whereby the door will be a firm andvrigid structure, but yet the heatconducting paths inthe door and in the frame will both be interrupted between ins terior of the chamber vto the exteriorthereof, so that there will be less loss of heat from the chamber and the exposed parts will be cooler.

The accompanying drawing illustrates my invention. Figurel is a front elevation of a door and associated partsof a frame of a device embodying my invention; and Fig. 2 is a section on the line 2 2 of'Fig. 1.

The chamber 10 is formed within the wall 1l, which is spaced from a supportingcasing 12 by suitable heat-insulating material 13', of any desired character and thickness. The open end of the chamber 11 is provided with a flange 15 which4 is Afastened by bolts 16 to a rabbeted inset portion 17 of the frame 12, but the flange 15 is separated from the inset portion 17 by a layer of heat insu-- lation 18, such as sheet asbestos, the bolts 16 passing through this asbestos, Y but the asbestos serving to insulate the frame 12 from the wall 11 so that but little heat is conducted from one to the other. This chamber 10 may be the oven of a stove, or the chamber of a lireless cooker, or any other chamber which requires heat insulated walls.

The casing 12 is provided with forwardly projecting hinge lugs 20 which coperate with the hinge lugs 21 on the frame 22 of a swinging door for the chamber 10. This frame 22 is in the form of a hollow rectangle, against the back of which bears a sheet metal plate 23. A second' sheet metal plate 24 is spaced from the plate 23 to provide a space of sufiicient thickness for suitable heat-insulating material 25, which is conveniently kieselguhr. This heat insulating material is held in place and the plates 23 and 24 held in proper relative position by a clamping member 26, which extends around the edge of the space occupied by said heat insulating material and overlaps upon the rear of the plate 24, and is heldin place by bolts 27 which extend through such over-lapping part and the platef`24v and heat insulating material 25 into rearwardlyextending lugs 28 on the door frame 22. Theforwardedge of the clamping member 26y extends against a heat-insulating gasket 29, conveniently of wire woven asbestos, and clamps such gasketL in place' against the rear wall of the frame 22, the gasket projecting outward beyond the clamping member 26 so as'to rest in the rabbet in the 'inset portion 27. This heat-insulating gasket 27 interrupts the heat path between the metallic clamping member 26 and the plate 24 on the one hand and the door frame 22 on the other. The'door frame and the casing may be provided with any suitable clamping means for holding the door shut, such as the swinging handle 30 on the door'and the downwardly extending finger 31 on the casing. i Y I I claim as my invention:

1. A heat-insulated chamber having Van inner wall, an outer frame, said wally and frame Vhaving registering openings, clarnping means for connecting said inner wall and outer frame around said openings, a layer of heat-insulating material separating Said inner wall and said frame laround said opening, and a door for projecting into such registeringopenings and closing the chamber. 1 Y

2.' VA heat insulated .chamber having an inner wall, an'L outer frame, said wall and frame having registering openings, a layer of heat-insulating material separating said inner wall and said frame around said openregistering openings and closing the chamber.

A heat-insulated chamber, comprising a wall having an opening, a frame surrounding said opening, and a door removably projecting into said opening, said door comprising a front member which overlaps the edge of the opening, a rear plate, heat-insulating material between the front member and the rear plate, aclampingmemberwhich overlaps upon the rear plate and extends across the edge of the space occupied by said heat-insulating material, and a gasket of heat insulating material which is clamped between the front edge of said clamping member and the rear face of said front Patented July. 24, 191 v.

lng, and a ,door for projecting into such i member and projects between the coperating portions .of said frame around the opening andthe overlapping front member of the door.

4L. A= heat insulated chamber, comprising a wall having an opening,l and a door removably projecting into said opening, said ydoor comprising a front member which overlaps the edge of the opening, a rear plate, heat-insulating material between the front member and the rear plate and separating said parts, a clamping mem- N- ber which overlaps upon the rear plate andileztends across-the edge of the space l5 occupielwbggsaid heat-insulating material,

Y, and a gasket of heat-insulating material Ywhich isclamped lbetween the front edge of said clamping memberand the rear face ofsaid ront member.

Y 5. A heat-insulated chamber, comprising a wall' having an opening, and a door re movably projecting linto said opening, said door comprising a front member which overlaps lthe edge of ,the opening, a rear plate, heat-insulating material between the front member and the rear plate andk separating ysaid' parts, a clamping member which overlaps upon the rearv plate and eX- a tendsl across the. edge Vof the space occupied by l*said heat-insulating material, ajgasket S of 'heat-insulating material which is clamped between the front edge of said clamping member and the rear face of said front memben/,andbolts connecting said clamping member and lthe front member of the doors.' I A y X p Y* .6.- A lheat-insulatedy chamber having van inner v wall, anl outer `r`-rame.said wall and trame vhaving registering openings, a layer 0 of heatinsulating; material separating said inner. wall and said frame around said opening, and a door` removably projecting into said opening, said door comprising a frontmember which overlaps the edge of the opening, a rear plate, heat-insulating qbnlsiliiwatent may. he obtained Afor insulating material which is clamped between the front edge of said clamping mem ber and the rear face of said front member.

7. A heat-insulated chamber, comprising a wall having an opening, and a door removably projecting into said opening, said door comprising a front member which `overlaps the edge of the opening, a rear plate spaced from said front member, a clamping memberv which overlaps upon the rear plate and extends acrossv the edgeoii` the space between the rear plate and the front member, and a gasket of heat-insulating material which is clamped'between the front ed'ge'of said clamping member andthe ,rear face of said front member yand projects; between the cooperating portions of said frame around the opening and the overlapping front member ofthe door.y K

8. A heat-insulated chamber, comprising awa'll having an opening; and a door .ren )vably projecting into said opening, said dior comprising `a 'f1-fontV member which ozerlaps the edge of the opening, a Arear plate spaced from said front member, a clamping memberl which overlaps upon the rear plate and extendssacross the edge of the jspace between the-rear plate and the front member, and ay gasket of heat-insuL lating materialI which is clampedy between the front' edge of said clamping member andthe rear face y'of said front-member.

In witness whereof, I' have hereuntoy set my hand and: seal inV the presence of two witnesses.

AJESSE JACKSON. [Ls] 1Witnesses:

JAsvC. PATrEN, M. E. LoUTH.-

five` vcents each, by'addn-:ssing4 the Commissioner of Patenta Washington, D. C. 

